Structural basis for safe and efficient energy conversion in a respiratory supercomplex
2022 | journal article; research paper. A publication with affiliation to the University of Göttingen.
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Structural basis for safe and efficient energy conversion in a respiratory supercomplex
Kao, W.-C.; Ortmann de Percin Northumberland, C.; Cheng, T. C.; Ortiz, J.; Durand, A.; von Loeffelholz, O. & Schilling, O. et al. (2022)
Nature Communications, 13(1) pp. 545. DOI: https://doi.org/10.1038/s41467-022-28179-x
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Details
- Authors
- Kao, Wei-Chun; Ortmann de Percin Northumberland, Claire; Cheng, Tat Cheung; Ortiz, Julio; Durand, Alexandre; von Loeffelholz, Ottilie; Schilling, Oliver; Biniossek, Martin L.; Klaholz, Bruno P.; Hunte, Carola
- Abstract
- Proton-translocating respiratory complexes assemble into supercomplexes that are proposed to increase the efficiency of energy conversion and limit the production of harmful reactive oxygen species during aerobic cellular respiration. Cytochrome bc complexes and cytochrome aa3 oxidases are major drivers of the proton motive force that fuels ATP generation via respiration, but how wasteful electron- and proton transfer is controlled to enhance safety and efficiency in the context of supercomplexes is not known. Here, we address this question with the 2.8 Å resolution cryo-EM structure of the cytochrome bcc-aa3 (III2-IV2) supercomplex from the actinobacterium Corynebacterium glutamicum. Menaquinone, substrate mimics, lycopene, an unexpected Qc site, dioxygen, proton transfer routes, and conformational states of key protonable residues are resolved. Our results show how safe and efficient energy conversion is achieved in a respiratory supercomplex through controlled electron and proton transfer. The structure may guide the rational design of drugs against actinobacteria that cause diphtheria and tuberculosis.
- Issue Date
- 2022
- Journal
- Nature Communications
- Project
- EXC 2067: Multiscale Bioimaging
- Working Group
- RG Fernández-Busnadiego (Structural Cell Biology)
- ISSN
- 2041-1723
- Language
- English